Network Structural and Tectonic Monitoring with Trimble Integrity

Network, Structural and Tectonic Monitoring with Trimble Integrity Manager Gavin Schrock, PLS – Seattle Public Utilities Infrastructure INF-1944

OUTLINE § Background – Washington State Reference Network – Regional Cooperative VRS Network § GIMI – GNSS Integrated Monitoring Initiative § Tolt Dam Pilot § Motion Engine Tests § Other Structural Pilots § Network CORS Integration – Legacy Method § Network CORS Integration – TIM Method

GIMI – GNSS Integrated Monitoring Initiative

Monitoring Principles

GIMI – GNSS Integrated Monitoring Initiative Primary Network Monitored by Central Washington University

GIMI – GNSS Integrated Monitoring Initiative Secondary Networks Monitored by WSRN and CWU

GIMI – GNSS Integrated Monitoring Initiative Individual Stations Monitored for Both Tectonic and Localized Motion

Tolt Dam Pilot LSIG TN TC TS BN BS

Tolt Dam Pilot

Tolt Dam Pilot USGS Seismograph Movement and/or perturbations of the ionosphere due to seismic events

Bridge Pilot

Bridges and Buildings

Floating Bridge Wind load on Evergreen Point Floating Bridge

Adjustment of WSRN CORS Sites to the National Spatial Reference System Legacy Method § § § 360 Hours Data 15 – 24 hr OPUS (Extended Output) Evaluation Of NGS CORS to Hold Network Adjustments – External Software 120 Hour Internal Coordinate Monitor Evaluation Ongoing Internal Coordinate Monitor Evaluations Station positions are re-computed when out of tolerance (per Coordinate Monitor, or if any hardware changes or intake/changes to any adjacent stations)

Trimble Integrity Manager

Adjustment of WSRN CORS Sites to the National Spatial Reference System Trimble Integrity Manager (TIM) Method § § § § 360 hours data 15 – 24 hr OPUS (extended output) Full weekly NGS CORS data Integrity Monitor (IM) weekly on NGS CORS data (evaluate CORS to hold) Weekly, monthly, quarterly IM PPS sessions Three-engine real-time IM evaluations (alarms) Development of velocity data for transformation database Legacy Evaluations will Continue to be Performed

THANK YOU www. wsrn. org gavin. schrock@seattle. gov